/**
 * Copyright (c) 2012, Ken Anderson
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification, 
 * are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice, 
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice, 
 *    this list of conditions and the following disclaimer in the documentation 
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR 
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 **/

#ifndef MCL_TIMER_H
#define MCL_TIMER_H

#include <time.h>

namespace mcl
{

// This class is a very simple timer.  
// It's accuracy is dependent on the POSIX implementation by the underlying OS.
// So it's usually only accurate down to milli-seconds.
// In the future, this may use Boost time or OS-APIs to get better accuracy.
class Timer
{
	
public:
	// Constructor/deconstructor
	Timer()	 { start(); }
	~Timer() {}

	// Start the timer
	inline void start();

	// Return the number of seconds elapsed since the last call to start.
	inline double getSeconds();

private:
	clock_t m_startTics;
};

// Inline functions

void Timer::start() 
{ 
	m_startTics = clock(); 
}

double Timer::getSeconds() 
{ 
	return ( clock() - m_startTics ) / (double)CLOCKS_PER_SEC; 
}

}; // namespace

#endif